feat: add new query for pending nonces using chain id

docs/openapi/openapi.swagger.yaml

@@ -27213,6 +27213,26 @@ paths:
             $ref: '#/definitions/googlerpcStatus'
       tags:
         - Query
+  /zeta-chain/crosschain/pendingNonces/{chain_id}:
+    get:
+      operationId: Query_PendingNoncesByChain
+      responses:
+        "200":
+          description: A successful response.
+          schema:
+            $ref: '#/definitions/crosschainQueryPendingNoncesByChainResponse'
+        default:
+          description: An unexpected error response.
+          schema:
+            $ref: '#/definitions/googlerpcStatus'
+      parameters:
+        - name: chain_id
+          in: path
+          required: true
+          type: string
+          format: uint64
+      tags:
+        - Query
   /zeta-chain/crosschain/protocolFee:
     get:
       operationId: Query_ProtocolFee
@@ -50660,6 +50680,11 @@ definitions:
     properties:
       feeInZeta:
         type: string
+  crosschainQueryPendingNoncesByChainResponse:
+    type: object
+    properties:
+      pending_nonces:
+        $ref: '#/definitions/crosschainPendingNonces'
   crosschainQueryTssHistoryResponse:
     type: object
     properties:

proto/crosschain/query.proto

@@ -94,6 +94,10 @@ service Query {
     option (google.api.http).get = "/zeta-chain/crosschain/pendingNonces";
   }
 
+  rpc PendingNoncesByChain(QueryPendingNoncesByChainRequest) returns (QueryPendingNoncesByChainResponse) {
+    option (google.api.http).get = "/zeta-chain/crosschain/pendingNonces/{chain_id}";
+  }
+
   // Queries a lastBlockHeight by index.
   rpc LastBlockHeight(QueryGetLastBlockHeightRequest) returns (QueryGetLastBlockHeightResponse) {
     option (google.api.http).get = "/zeta-chain/crosschain/lastBlockHeight/{index}";
@@ -253,6 +257,14 @@ message QueryAllPendingNoncesResponse {
   repeated PendingNonces pending_nonces = 1;
 }
 
+message QueryPendingNoncesByChainRequest {
+  uint64 chain_id = 1;
+}
+
+message QueryPendingNoncesByChainResponse {
+  PendingNonces pending_nonces = 1 [(gogoproto.nullable) = false];
+}
+
 message QueryGetLastBlockHeightRequest {
   string index = 1;
 }

x/crosschain/keeper/keeper_pending_nonces.go

@@ -93,3 +93,23 @@ func (k Keeper) PendingNoncesAll(c context.Context, req *types.QueryAllPendingNo
 		PendingNonces: list,
 	}, nil
 }
+
+func (k Keeper) PendingNoncesByChain(c context.Context, req *types.QueryPendingNoncesByChainRequest) (*types.QueryPendingNoncesByChainResponse, error) {
+	if req == nil {
+		return nil, status.Error(codes.InvalidArgument, "invalid request")
+	}
+
+	ctx := sdk.UnwrapSDKContext(c)
+	tss, found := k.GetTSS(ctx)
+	if !found {
+		return nil, status.Error(codes.NotFound, "tss not found")
+	}
+	list, found := k.GetPendingNonces(ctx, tss.TssPubkey, req.ChainId)
+	if !found {
+		return nil, status.Error(codes.NotFound, fmt.Sprintf("pending nonces not found for chain id : %d", req.ChainId))
+	}
+
+	return &types.QueryPendingNoncesByChainResponse{
+		PendingNonces: list,
+	}, nil
+}